Multithreading with the 2.0b API

Thank you for making this great work available. and I am really happy with what it is able to do so far.

The only thing I am expecting to have is the multithreading with the client object which does not seem to work, i.e. doing concurrent uploading or downloading. Could you clarify on this issue?

Another minor issue, which might have nothing to do with the api, is that I keep getting random timeout in consecutive download operations. This might be server issues, if not, I were interested in case you know why..